[3] The "http://www.bbc.co.uk/science/humanbody/mind/surveys/neckercube/" page as been archived and is no longer updated.
[4] Ibid.
[5] D. Apter, "Reversal Theory: A New Approach to Motivation, Emotion, and Personality", Anuario de Psicologia, Num. 42, 1989 (3), www.raco.cat/index.php/AnuarioPsicologia/article/.../88631 (webpage no longer valid)
[6] Solomon, R. L., & Corbit, J. D. (1974). An opponent-process theory of motivation: I. Temporal dynamics of affect. Psychological Review, 81, 119-145 - skydiver study
[8] "Preference by Association: How Memory Mechanisms in the Hippocampus Bias Decisions", G. Elliott Wimmer and Daphna Shohamy, Science, DOI: 10.1126/science.1223252, , 270 (2012); 338